【摘要】 本研究以形态测量学方法,对于用辣根过氧化酶(HRP)作家兔直肠平滑肌注射后标记的骶尾髓中间带外侧核(IML)与平滑肌内侧核(NMM),以及作为对照组的同节段前角运动细胞(VH)进行测量,经t检验分析,结果表明:NMM细胞直径显著大于VH,而其体密度与面密度却显著小于后者,提示NMM确实是一组独特的神经元。其次,就IML细胞位置而论,位于灰质中间带者占58％,位于中间带背侧者占31％,位于中间带腹侧者占9％,说明家兔IML位置较以往认识更偏向背外侧。同时,IML可分为主部与索部,两部细胞数大致相等。更多还原

【Abstract】 ABSTRACT With morphometric methods, the present study has measured and analyzed the labelled cells, which were located in the intermediolateral nucleus (IML) and the nucleus myoleioticus medialis (NMM) in sacrococcygeal spinal cord, and the motoneurons of the ventral horn (VH) in the same segments as the control group, after horseradish peroxidase (HRP) injections into the rectal smooth muscles of the rabbit. The results showed that the diameters of NMM cells are significantly larger than that of VH cells, however, body and surface densities of NMM cells are significantly smaller than those of VH cells by t test, suggesting that NMM is indeed a distinguished neuron group. Next, as far as the location of IML is concerned, only 58% of its cells are really within the intermediate zone, 31% of them dorsally to the zone, and 9% ventrally to the zone, showing the location is more dorsolaterally than that believed previously. Moreover, IML of the rabbit spinal cord can be subdivided into the principle portion and the funicular one, both of which are proximately equal in cell numbers.更多还原